2-Pentanol → HCID 71240769, compound

Participants

Reaction Steps

A solution of 3-(2-chloropyrimidin-4-yl)pyrazolo[1,5-a]pyridine (Intermediate 152, 256 mg, 1.00 mmol), p-toluene sulphonic acid monohydrate (271 mg, 1.43 mmol) and 2-methoxy-4-(1-methyl-3,6-dihydro-2H-pyridin-4-yl)-5-nitroaniline (Intermediate 3, 250 mg, 0.95 mmol) and 2-pentanol (12 mL) was heated at reflux for 4 h under an atmosphere of N2. The mixture was then concentrated in vacuo and the residue was dissolved in CH3OH. This solution was purified by ion exchange chromatography, using an SCX column, eluting with 7M methanolic ammonia. Fractions containing the desired product were concentrated in vacuo to give a residue that was dissolved into hot DMF (10 mL). This solution was filtered and concentrated in vacuo to provide a gum that was triturated with CH3CN (10 mL) to give the title compound (285 mg, 66%) as a yellow powder; 1H NMR: 2.36 (5H, s), 2.67 (2H, s), 3.07 (2H, s), 4.02 (3H, s), 5.66 (1H, s), 7.00 (1H, s), 7.12 (1H, t), 7.41 (1H, m), 7.45 (1H, m), 8.45 (2H, t), 8.59 (1H, d), 8.83 (2H, t), 8.90 (1H, s); m/z: ES− M-H− 456.

Provenance & Evidence